bytedance/seedream-4.5-t2i

seedream-4.5-t2i
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Schema

[Core Function] Seedream 4.5 T2I is a high-fidelity visual creation model. [Strengths] It provides all-round improvements in consistency, aesthetics, and photorealism, supporting high-definition outputs up to 4K resolution. [Best For] Highly recommended for: professional visual creatives, photorealistic artwork, and high-res commercial graphics. [Limitations] It lacks the real-time web search and advanced reasoning capabilities of the 5.0 Lite model. [Routing] Use this model when the priority is absolute visual fidelity, resolution (4K), and consistency without the need for real-time search.

$0.0420/img
text-to-image

Input

Image description text, supports Chinese and English. Maximum 10000 characters. We recommend keeping the prompt under 600 words. Excessively long prompts may scatter information, causing the model to overlook details and focus only on major elements, which can result in missing details in the generated image.
Image size in format 'widthxheight'. Minimum pixels: 2560x1440 (approx 2K) = 3,686,400. Range: Total pixels 3,686,400 to 16,777,216, aspect ratio 1/16 to 16
Prompt optimization mode. Only 'standard' mode is supported for 4.5
standard
Batch generation mode
disabled
Maximum number of images for batch generation

Result

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README

Parameters

Name Description Type Required Enums
prompt Image description text, supports Chinese and English. Maximum 10000 characters. We recommend keeping the prompt under 600 words. Excessively long prompts may scatter information, causing the model to overlook details and focus only on major elements, which can result in missing details in the generated image. string Yes -
size Image size in format ‘widthxheight’. Minimum pixels: 2560x1440 (approx 2K) = 3,686,400. Range: Total pixels 3,686,400 to 16,777,216, aspect ratio 1/16 to 16 string No -
optimize_prompt_mode Prompt optimization mode. Only ‘standard’ mode is supported for 4.5 string No standard
sequential_image_generation Batch generation mode string No auto, disabled
sequential_image_generation_max_images Maximum number of images for batch generation integer No -

Pricing

Unit: $/img

Pricing
$0.0420/img
  • bytedance/seedream-4.0-t2i: [Core Function] Seedream 4.0 T2I is an older high-definition image creation model. [Strengths] It generates high-definition images up to 4K. [Best For] Existing workflows. [Limitations] Superseded by Seedream 4.5 in fidelity and consistency. [Routing] Default to Seedream 4.5 unless 4.0 is explicitly requested.
  • bytedance/seedream-5.0-lite: [Core Function] Seedream 5.0 Lite is a smart, reasoning-enhanced image generation model with real-time web search capabilities. [Strengths] It excels at generating time-sensitive imagery, infographics, and content requiring deep world knowledge or online search, boasting superior prompt understanding and reasoning. [Best For] Highly recommended for: current-event posters, text-heavy designs, and concept art requiring complex logical reasoning. [Limitations] As a ‘Lite’ model, its absolute photorealistic aesthetic ceiling might be slightly lower than the specialized 4.5 model. [Routing] Use this model by default when the user needs real-time information, deep reasoning, or complex intent understanding in their image.
  • bytedance/seedream-4.0-i2i: [Core Function] Seedream 4.0 I2I is an older generation image-to-image editing model. [Strengths] Maintained primarily for backward compatibility and stable API contracts. [Best For] Existing legacy integrations and workflows that strictly depend on this specific model version’s quirks. [Limitations] Do NOT use this for new creations. It is a legacy model maintained for backward compatibility. [Routing] Only use if explicitly requested; otherwise use Seedream 5.0 Lite I2I.
  • bytedance/seedream-4.5-i2i: [Core Function] Seedream 4.5 I2I is a high-fidelity image editing model. [Strengths] It provides high-consistency, high-resolution style transfer and image-to-image transformations. [Best For] Highly recommended for: professional aesthetic modifications and high-resolution edits. [Limitations] Lacks the advanced reasoning of 5.0 Lite. [Routing] Use this for pure aesthetic/high-fidelity edits.
  • bytedance/seedream-5.0-lite-edit: [Core Function] Seedream 5.0 Lite Edit is a reasoning-enhanced, smart image editing model. [Strengths] It features superior cross-modal understanding and reasoning, allowing for highly accurate, interactive multi-turn image editing with real-time knowledge enhancement. [Best For] Highly recommended for: complex image editing tasks, structural modifications, and edits requiring deep semantic understanding. [Limitations] As a ‘Lite’ model, raw visual rendering might not match the 4.5 tier. [Routing] Use this model by default for complex, reasoning-based image editing tasks.
  • google/nano-banana-2: [Core Function] Nano Banana 2 (Gemini 3.1 Flash Image) is an extremely fast text-to-image model. [Strengths] It is optimized for high-speed, high-volume visual generation, creative prompting, and rapid stylistic experimentation. [Best For] Highly recommended for: rapid creative iteration, generating large batches of images quickly, and artistic/stylized graphics. [Limitations] Do NOT use this model if you require strict, high-end photorealism (use the Imagen 4 series instead). [Routing] Route to this model for ‘fast’, ‘creative’, or ‘stylized’ high-volume requests.
  • google/nano-banana-pro: [Core Function] Nano Banana Pro (Gemini 3 Pro Image) is a high-capability creative image model. [Strengths] It balances the creative flexibility and speed of the Nano series with higher fidelity output. [Best For] Highly recommended for: high-quality stylized art and complex creative compositions. [Limitations] Do NOT use for absolute photorealism (use Imagen 4). [Routing] Use this model for high-quality, creative, non-photorealistic requests.
  • kling/kling-v3-t2i: [Core Function] Kling V3 T2I is the flagship text-to-image generation model. [Strengths] It delivers state-of-the-art aesthetic quality, high-resolution outputs (up to 2K), and exceptional prompt adherence. [Best For] Highly recommended for: professional concept art, photorealistic portraits, and high-fidelity image generation. [Limitations] Do NOT use this model if you need to strictly reference or edit an existing image. [Routing] Use this as the default model for all text-to-image requests on the Kling platform.
  • xai/grok-imagine-image-quality: [Core Function] Grok Imagine Image (Quality) is xAI’s high-fidelity text-to-image generation model. [Strengths] It excels at producing richly detailed, high-quality images from a text prompt, with flexible aspect ratios and an optional 2K resolution. [Best For] Highly recommended for: detailed concept art, marketing visuals, and any scenario where image quality is prioritized over generation speed. [Limitations] Do NOT use this model when latency is critical, as generation is slower than the standard model. [Routing] Use this model by default when the user emphasizes quality or detail. For faster, lighter generation use Grok Imagine Image (standard).
  • openai/gpt-image-2: [Core Function] GPT Image 2 is a state-of-the-art text-to-image generation model. [Strengths] It excels at generating highly detailed, photorealistic images from text descriptions, with native support for ultra-high resolutions including 2K and 4K (up to 3840x2160). [Best For] Highly recommended for: cinematic landscapes, detailed character portraits, high-end commercial concept art, and any scenario requiring maximum resolution and visual fidelity. [Limitations] Do NOT use this model if you need a transparent background (e.g., for icons or UI assets), as it does not support the background: transparent parameter. [Routing] Use this model by default for all high-quality image generation requests. If the user explicitly asks for an image with a transparent background, route to GPT Image 1.5 instead.
  • microsoft/mai-image-2.5: [Core Function] MAI Image 2.5 is Microsoft’s flagship text-to-image generation model. [Strengths] It excels at producing high-quality, detailed images from a text prompt with precise control over output dimensions. [Best For] Highly recommended for: concept art, marketing visuals, and high-fidelity image generation. [Limitations] Do NOT request dimensions below 768 on any side or a width x height product above 1,048,576 pixels (e.g. beyond 1024x1024); output is always PNG. [Routing] Use this model by default for quality-sensitive generation. For faster, cheaper generation, route to MAI Image 2.5 Flash.

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